使用yum安装mysql
yum安装mysql，在学习测试sql语句时方便省事，记录下来吧
安装就几条命令：
wget http://repo.mysql.com/mysql57-community-release-el7-8.noarch.rpm
rpm -ivh mysql57-community-release-el7-8.noarch.rpm
yum install mysql-server m...
mysql 备份脚本
```bash
#!/bin/env bash
#================================================================
#
# systemos=centos6.9
# #this is mysql backups scripts
# Author：xw thank you!!!
# Date：2...